嵌入式高分辨率VGA显示系统的研究

发布时间：2018-06-14 13:07

本文选题：VGA + ARM　；参考：《天津大学》2007年硕士论文

【摘要】： “嵌入式高分辨率VGA显示系统”是一种嵌入式便携式的VGA显示设备。它可以在不使用计算机和VGA显示卡的情况下,实现VGA图像的显示和控制。主要可应用于大型超市、车站、飞机场等公共场所的广告宣传和提示信息发布;也可以安装在工厂车间,用于生产过程中的操作信息显示;还可以开发成多媒体电子挂历系统应用于日常生活。本文设计并实现了1024*768图像(XGA)、800*600图像(SVGA)和640*480图像(VGA)三种分辨率图像的显示。本文的主要任务是通过分析VGA显示的基本原理和信号要求,设计整个系统的软、硬件结构,包括VGA时序和显存读时序的发生,实现多媒体数据的存储、JPEG图像解码、汉字和字符显示、音频信号输出,以及通过EPP接口、以太网接口和串口实现系统的数据传输和远程控制等功能。本文的主要工作包括: 1.在深入分析VGA技术标准的基础上,提出了嵌入式VGA显示系统的总体设计方案和基本功能。 2、完成了嵌入式VGA显示系统各单元的设计。采用CPLD等器件实现了VGA时序和显存读时序的发生;采用高速数模转换芯片ADV7120完成了VGA模拟信号的输出;采用ARM和DSP实现了系统的整体控制和数据处理。 3、采用了快速一维IDCT算法,实现了29次乘法和11次加法完成一次8位一维IDCT变换的功能,达到了JPEG图像高速解码的要求。 4、设计了VGA显示系统的嵌入式软件和上位机软件。完成了基于以太网接口和EPP接口的数据传输和通信控制等功能。本文的研究成果——嵌入式高分辨率VGA显示系统板,经过实验证明其显示效果和主要参数完全能够满足使用要求。
[Abstract]:The "embedded high resolution VGA display system" is an embedded portable VGA display device. It can display and control the VGA image without the use of computer and VGA display cards. It can be used in public places such as large supermarkets, stations, airports and other public places. The factory workshop is used to display the operation information in the process of production; it can also be developed into a multimedia electronic calendar system used in daily life. This paper designs and implements three resolution images of 1024*768 images (XGA), 800*600 images (SVGA) and 640*480 images (VGA).
The main task of this paper is to design the software and hardware structure of the whole system by analyzing the basic principles and signal requirements of VGA display, including the occurrence of VGA timing and memory sequence, the realization of the storage of multimedia data, the decoding of JPEG images, the display of Chinese characters and characters, the output of audio signals, and the implementation of the EPP interface, Ethernet interface and serial port. The functions of data transmission and remote control of the system.
The main work of this article includes:
1. based on in-depth analysis of VGA technology standards, the overall design and basic functions of embedded VGA display system are put forward.
2, the design of each unit of the embedded VGA display system is completed. CPLD and other devices are used to realize the occurrence of VGA sequence and memory sequence. The output of VGA analog signal is completed with high speed digital mode conversion chip ADV7120, and the system's overall control and data management are realized by ARM and DSP.
3, a fast one dimensional IDCT algorithm is adopted, which realizes the function of 29 times multiplication and 11 addition of 8 bit one dimensional IDCT transform, and achieves the requirement of high speed decoding of JPEG image.
4, the embedded software and PC software of the VGA display system are designed. The functions of data transmission and communication control based on Ethernet interface and EPP interface are completed.
The research result of this paper is the embedded high resolution VGA display system board, which has been proved by experiments that its display effect and main parameters can meet the requirements.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2007
【分类号】：TN27;TP273

【引证文献】